$OpenBSD: patch-src_background_cpp,v 1.1.1.1 2011/06/05 11:13:47 stsp Exp $

This fixes a random crash that happened during the second screen in the game.

--- src/background.cpp.orig	Fri Apr 10 12:57:23 2009
+++ src/background.cpp	Sat Jun  4 23:31:33 2011
@@ -184,7 +184,12 @@ void Background::MueveOvni ()
      int Velocidad;
      for (int n = 0; n < MaxOvnis; n++) {
          Ovni[n].IncX ((int) Ovni[n].VerVelX());
-         Ovni[n].SetY ((int) (OrigOvni[n] + (3 + n) * FuncionSeno[Ovni[n].VerX()]));
+	 int x = Ovni[n].VerX();
+	 if (x < 0)
+	     x = 0;
+	 else if (x >= FramesCirculo)
+	     x = FramesCirculo - 1;
+         Ovni[n].SetY ((int) (OrigOvni[n] + (3 + n) * FuncionSeno[x]));
 
          if ((Ovni[n].VerX(true) < 0 || Ovni[n].VerX(false) > 640) && !((int)(rand() % 60))) {
             if ((int)rand() % 2)
